Concrete-cleaner.



RI C. STUBBS.

CONCRETE CLEANER.

APP L|CAT|0N FILED AUG.2B. |916.

Patented Jan; 30, 1917.

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STATE@ PATENT FFTCE.

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CONCRETE-CLEAEE.

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Application led August 28, 1916.

i machine, and particularly to machines `provided with cleaning devices to be operated at high speed when moved over the concrete,

and the object is to provide a device for cleaning dirt, dust and mortar coating from fresh laid concrete, that is, concrete which has been laid and set and which has a rough surface ready to receive a wearing coat of adhering material. In order that the adhering material shall be rmly and permanently set on the concrete, all the dirt and mortar coating, and even the dust, must be taken from the rough concrete. For this purpose a cleaning device must be used which has a constantl high speed and it is necessary to transport such cleaning device over the surface with some 4slow moving truck which can be moved at any speed desirable and in anyL direction desirable. Some portions of the concrete will need more scrubbing than other portions and for this reason, the truck can be moved at a low speed and a higher speed whenever desired, but the cleaning device must run at a constant high rate of speed.

The object is to provide a revolving cleaner which is provided with spring steel, highly flexible and resilient cleaning brushes which can bc readily adjusted relative to the surface to be cleaned.

Other objects and advantages will be fully explained in the following description and the invention will be more particularly pointed out in the claims.

Reference is had to the accompanying drawings which form a part of this application.

Figure 1 is a perspective view of the inachine. Fig. 2 is a side elevation of the supporting wheel and the adjusting mechanism. Fig. 3 is a rear elevation of the adjusting mechanism. Fig. et is a similar view to Fig. 3, but showing the adjusting frame in section. Fig. 5 is a detail view of the revolving broom, showing the drum and part of the spring steel brushes.

Similar characters of reference are used Specication of Letters Patent. Patjmtd 13' am. 3GB, T9112'.

serial no. 117,144.

to indicate the sameparts throughoutV the several views. y Y

rThe improved cleaner is provided with a which are attached to the deck 1. The

braces 5, each consist of a single bar of iron having inclined portions extending up to the deck 1 and a horizontal portion 6, carrying bearing 7 for the shaft 8 of the brush drum 9. rlhe deck 1 is further supported by a standard or rear support 10 which is bolted to the deck 1. The support 10 is provided with a roller 11. The standard 10 is curved for the purpose hereinafter explained. Brackets 12 are riveted rigidly to the braces 5 near the front of the machine. A swinging frame, composed of side arms 13 and 14 and rear bar 15, is connected to the brackets 12 by pivot'J bolts 16 so that the front part of the deck 1 issupported .on the pivot bolts 16. The frame pieces 13 and 14 are supported by the wheels 17 and 18 which should be ball bearing wheels. Spindles 19 are bolted rigidly to the frame pieces 13 and 14 for the wheels 17 and 18. lThe weight of the deck.

` 1 with the propelling motor .2 bearing/down on the front ofthe frame pieces 13 and 14 would tend to elevate the rear ends of these frame pieces with the cross-bar 15. If'not otherwise checked, the'frame piece 15 will be stopped by the curved portion of the support 10. A trip 20 is pivotally connected with the standard 10 and Operates in a slot 21 which is made in this support. A spiral spring 21 is attached to support 10 and to the trip 20 and tends to draw the upper part of trip 20 forward and to cause the lower part to bear against the bar 15. The trip 20,y

has a shoulder 22 which is adapted to engage the upper edge of the bar 15. A foot piece or b earing 23 is attached to bar 15.

When the broom is to be brought out ofvop- 100 thus hold the rear end of the swinging 105 frame down while the broom is not operating. rThe shoulder 22 will prevent the rear end of the frame from rising and so hold the broom up out of operative position. To release the bar 15 from the shoulder 22, raise 110 25 are attached to braces 5 and a kplurality of holes made in the hangers so that the stops 24 can be inserted at thevproper positions yto secure the desired pressure ofthe brushes against the concrete. The wheels 17 and 18 support the broom but have nothing to do with drivingl the broom. The broomis driven by the motor 2. A sprocket wheel y26 is mounted rigidly on the broom shaft 8 and is' driven by a sprocket chain 27 which is driven by -a sprocket wheel 28 wghichis rigid with a counter shaft 29. The shaft 29 is driven by gearing from shaft 4 of the motor 2. A sprocket wheel 31 is rigid-'with shaft 4 and drives al sprocket chain which drives shaft 2.9. A belt 32 drives a fan 33 from the shaft 29. The broom is made up of a drum 9 (which may be of wood) and steel brushes 34. These brushes maybe made. of steel ,but may be I away,

made of other material and'must be flexible and. highly resilient. They'must not' only brush material away but must loosen the material and brush the loosened material Vanes or dust guards 35 are provided to prevent the dirt and vdust and other material from being thrown on the groundV or surface already cleaned. A standard 36'vis pivotally mounted on the deck 1 by means ofy brackets37 and this standard has an arm 37 which is riveted to the vane 37. The vane'can thus be shifted from one side to the other of the machine Ito prevent the dirt and other matter from being thrown'to one side on' the concrete already cleaned. A clutch 38 is .provided for throwing the broom into or out of working condition.l

The operator uses theV machine by pushing the machinev along on the surface while the motor is driving the broom. A hand rail 38 is secured to the deck 1 and the operator pushes the machine along as slowly 'or as fast as may be necessary, but the speed 'of -locomotion of the machine does not affect 'the speed of the broom which is being driven bythe motor. v

What I claim is.

- 1. A concreteA cleaner comprising a deck,

la high speed motor mountedon said deck,

bearing frames attached to said deck, a revoluble cleaner journaled in said frames, gearingoperatively connecting said cleaner and said motor, a swinging frame pivotallyj connected to said bearing frame, supporting wheels journaled on said swinging fra-me and operating independently of said motor and revoluble cleaner, and means for adjusting said revoluble cleaner relative to said swinging-frame.

2. A concrete cleaner comprising a deck,

a high speed motor mounted on said deck,

'naled'in said bearing frames, a high speed motor mounted on said deck and operatively connected with said cleaner, a wheeled support for one end of said deck, a swinging frame pivotally connected to said bearing frames at one end and adjustably connected to said wheeled support and supporting wheels journaled on said swinging frame, said motor and cleaner operating independently of said supporting wheels.

4. A'concrete cleaner comprising a deck, a wheel support for one lend of said deck, a swinging frame operatively connected to the other end of said deck, means for justing said swinging frame relative to said wheel support, supporting wheels journaled o'n said swinging frame, a revoluble cleaner journaled on said deck, a high speed motor Amounted on said deck for driving said 1 cleaner independently of said supportmg wheels. y

5. A concrete cleaner comprising a deck, a wheeled supportfor one end of said deck,

bearing frames attached to said deck, a rev,

oluble Vcleaner journaled in bearings supported by the bearing frames, a swinging frame operatively connected to said bearing frames and adjustably connected to sa1d wheeled support, supporting wheels journaled on said swingingA` frame., means mounted 'on said deck for driving said drum land means for adjusting sa1d swinging frame relative to said wheeled support.

In testimony whereof, I set my hand, this 17th day of August, 1916. I

j ROBERT c. sTUBBs. 

